incredulous

1 inclined to doubt or question claims incredulous by nature, I'm of course very suspicious of anyone who claims to be able to communicate with the dead Synonyms disbelieving, distrustful, doubting, skeptical, mistrustful, negativistic, questioning, show-me, suspecting, suspicious, unbelievingRelated Words paranoid (also paranoidal); critical, puzzled, quizzical; careful, cautious, guarded, gun-shy, leery (also leary), wary, watchful; cynical, experienced, knowing, sophisticated, worldly, worldly-wise; curious, inquiring, inquisitive, nosy (or nosey), snoopy; uncertain, unconvinced, undecided, undetermined, unsettled, unsure; hesitantNear Antonyms green, ingenuous, innocent, naive (or naïve), simple, simpleminded, unknowing, unsophisticated, unworldly, wide-eyed; certain, confident, positive, sure; callow, inexperienced, raw; childlike, idealistic, impractical; beguiled, deceived, duped, gulled, tricked; careless, heedless, unsuspecting, unsuspicious, unwaryAntonyms credulous, gullible (also gullable), trustful, trusting, uncritical, unquestioning

2 too extraordinary or improbable to believe an incredulous account of alien abduction that the tabloids had a field day with Synonyms fantastic (also fantastical), implausible, inconceivable, incredible, unbelievable, uncompelling, unconceivable, unconvincing, unimaginable, unthinkableRelated Words debatable, disputable, dodgy [chiefly British], doubtable, doubtful, dubious, dubitable, far-fetched, fishy, flimsy, questionable, shaky, suspect, suspicious, unlikely, unreasonable; hopeless, impossible; absurd, comical, farcical, laughable, ludicrous, outlandish, preposterous, ridiculous, risible, silly; indefensible, insupportable, untenableNear Antonyms likely, possible, probable; reasonable; certain, incontestable, indisputable, indubitable, questionless, sure, undeniable, undoubted, unquestionableAntonyms believable, cogitable, conceivable, convincing, credible, creditable, imaginable, plausible, supposable, thinkable